package com.nowcoder.community.controller;

import com.nowcoder.community.annotation.LoginRequired;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.FollowService;
import com.nowcoder.community.service.LikeService;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.HostHolder;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.Map;


@Controller
@RequestMapping("/user")
public class UserController implements CommunityConstant{

    private static final Logger logger = LoggerFactory.getLogger(UserController.class);

    @Value("${community.path.domain}")
    private String domain;

    @Value("${community.path.upload}")
    private String uploadPath;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @Resource
    private UserService userService;

    @Resource
    private HostHolder hostHolder;

    @Resource
    private LikeService likeService;

    @Resource
    private FollowService followService;

    @LoginRequired
    @RequestMapping(path = "/setting",method = RequestMethod.GET)
    public String getSettingPage(){
        return "/site/setting";
    }



    //上传头像
    @LoginRequired
    @RequestMapping(path = "upload",method = RequestMethod.POST)
    public String uploadHeader(MultipartFile headerImage, Model model){
        if (headerImage == null){
            model.addAttribute("error","你还没有上传图片！");
            return "/site/setting";
        }

        //上传头像文件
        String fileName = headerImage.getOriginalFilename();
        String suffix = fileName.substring(fileName.lastIndexOf("."));
        if (StringUtils.isBlank(suffix)){
            model.addAttribute("error","文件格式不正确！");
            return "/site/setting";
        }
        //生成随机的文件名
        fileName = CommunityUtil.generateUUID()+suffix;
        //确定文件存放路径
        File dest = new File(uploadPath+"/"+fileName);
        try {
            //存放文件
            headerImage.transferTo(dest);
        } catch (IOException e) {
            logger.error("上传文件失败："+e.getMessage());
            throw new RuntimeException("上传文件失败，服务器发生异常！",e);
        }
        //更新当前用户头像的的路径（web访问路径）
        // http://localhost:8080/community/user/header/xxx.png
        User user = hostHolder.getUser();
        String headUrl = domain+contextPath+"/user/header/"+fileName;
        userService.updateHeader(user.getId(),headUrl);
        return "redirect:/index";
    }

    //获取头像
    @RequestMapping(path = "/header/{fileName}",method = RequestMethod.GET)
    public void getHeader(@PathVariable("fileName") String fileName, HttpServletResponse response){
        //服务器存放路径
        fileName = uploadPath+"/"+fileName;
        //文件后缀
        String suffix = fileName.substring(fileName.lastIndexOf(".")+1);
        //响应图片
        response.setContentType("/image"+suffix);

        try (FileInputStream fileInputStream = new FileInputStream(fileName);
             OutputStream outputStream = response.getOutputStream();
        ){
            byte[] buffer = new byte[1024];
            int b = 0;
            while ((b = fileInputStream.read(buffer)) != -1){
                outputStream.write(buffer,0,b);
            }
        } catch (IOException e) {
            logger.error("读取头像失败:"+e.getMessage());
        }
    }


    //修改密码
    @RequestMapping(path = "/updatePassword",method = RequestMethod.POST)
    public String updatePassword(String oldPassword,String newPassword,Model model){
        User user = hostHolder.getUser();
        Map<String,Object> map = userService.updatePassword(user.getId(),oldPassword,newPassword);
        if (map.isEmpty() || map==null){
            return "redirect:/logout";
        }else{
            model.addAttribute("oldPassword",map.get("oldPassword"));
            model.addAttribute("newPassword",map.get("newPassword"));
            return "/site/setting";
        }
    }

    //个人主页(既可以访问自己的主页，也可以访问他人的主页)
    @RequestMapping(path = "/profile/{userId}",method = RequestMethod.GET)
    public String getProfilePage(@PathVariable("userId") int userId,Model model){
        User user = userService.findUserById(userId);
        if (user == null){
            throw new RuntimeException("该用户不存在");
        }
        //用户
        model.addAttribute("user",user);
        //点赞数量
        int likeCount = likeService.findUserLikeCount(userId);
        model.addAttribute("likeCount",likeCount);
        //粉丝数量
        long followerCount = followService.findFollowerCount(ENTITY_TYPE_USER,userId);
        model.addAttribute("followerCount",followerCount);
        //关注数量
        long followeeCount = followService.findFolloweeCount(userId,ENTITY_TYPE_USER);
        model.addAttribute("followeeCount",followeeCount);
        //是否已关注
        boolean hasFollowed = false;
        if (hostHolder.getUser() != null){
            hasFollowed = followService.hasFollowed(hostHolder.getUser().getId(),ENTITY_TYPE_USER,userId);
        }
        model.addAttribute("hasFollowed",hasFollowed);

        return "/site/profile";
    }

}
